diff --git a/trytond/model/modelsql.py b/trytond/model/modelsql.py
index 6a562a4855..7db78650ef 100644
--- a/trytond/model/modelsql.py
+++ b/trytond/model/modelsql.py
@@ -1383,7 +1383,7 @@ class ModelSQL(ModelStorage):
                         ids2 = map(int, Target.search([
                                     ('rec_name', 'ilike', domain[i][2]),
                                     ], order=[]))
-                    elif isinstance(domain[i][2], (int, long)):
+                    elif not isinstance(domain[i][2], list):
                         ids2 = [domain[i][2]]
                     else:
                         ids2 = domain[i][2]
@@ -1479,7 +1479,7 @@ class ModelSQL(ModelStorage):
                         ids2 = map(int, Field.search([
                                     ('rec_name', 'like', domain[i][2]),
                                     ], order=[]))
-                    elif isinstance(domain[i][2], (int, long)):
+                    elif not isinstance(domain[i][2], list):
                         ids2 = [domain[i][2]]
                     else:
                         ids2 = domain[i][2]